With IPv6 there's new train of thought around this technology than IPv4. Since this protocol does away with broadcasts, is creating different VLANs necessary? Some people will argue that you can apply different ACLs on different VLANs, however SDN is also changing the way we manage our equipment.
I was wondering if there is a way to use SDN technology to tag a port like on Meraki devices to use in conjunction with security - i.e. Ports tagged with "general-client" cannot access servers with tag "High-Security"
This way, we can keep the network simple with one big LAN and also keep security.
-- EDIT -- Let me re-phrase my question since I think the question is confusing. Since IPv6 doesn't not have broadcast do we need separate L2 broadcast domains by creating VLANs? Even before new SDN technologies, we have technologies like isolated ports (like in ASA5505), VACLS and private VLAN, to stop hosts from talking to each other in the same LAN.
With SDN on the rise with tagged ports like with Meraki vendor, is the only thing that keeps us having one large internal corporate LAN, security boundaries - which SDN may solve in an IPv6 network? Having two different network segment between ISP and Internal Network is already understood.